Polyurethane and 20 to 60% Ivory or bone get the perfect finished color for a polished ivory look. These Grips are made to close specifications to assure a good fit, some sanding will be required to get a perfect fit. These are and easy fit on the 1873 Colt, 1st, 2nd, & 3rd Generation COLT SINGLE ACTION ARMY. When any of these grips are installed as a ONE PIECE GRIP they will come with a spacer to be glued between the grip halves. When any of these grips are installed as a TWO PIECE GRIP they will require drilling a screw hole and installing Grips escutcheons and screw. to be ordered separately.